Improvement work on 21st Street, one of the busiest roads in San José, began this week, the Ministry of Public Works and Transportation (MOPT) announced.

The project focused on a street segment between 2nd and 3rd Avenues close to the Atlantic Train Station, including removing damaged asphalt, constructing a new road surface, widening sidewalks, replacing the underground sewer system, and adding trees and greenery to enhance the area.

During the first week of construction, traffic officers will regulate vehicle flow. However, starting Monday, Jan. 27, the road will be completely closed to vehicles for approximately 18 weeks, or four and a half months.

Authorities warn the closure is likely to cause significant traffic jams in the surrounding areas.

Drivers are advised to avoid the route, and traffic officers will redirect vehicles to designated alternative routes to help reduce congestion.

The ministry expects the newly improved road to open in June.

The 21st St. project is part of a larger national infrastructure rehabilitation effort. Last week, officials inaugurated a new roundabout in San José named after former U.S. Ambassador Raymond L. Telles Jr.

Additionally, the Central American Bank for Economic Integration (CABEI), headquartered in Honduras, recently approved $5.9 million in funding to conduct studies for repairing various roads across Costa Rica.

The Ministry of Public Works and Transportation (MOPT) oversees the planning and construction of roads, airports, and maritime ports, as well as regulating public transportation.